(noun)a phonecall,page,or conversation aimed at getting into your pants.Not an invite to a movie or dinner, not just coffee, not a casual or formal get-together, just a plain old-fashioned "let's fuck"

I woke at 4 a.m. with a massive hard-on. I picked up the phone and gave Ruthie a booty call. I wanted to mount her so very, very much. I had it REAL bad !

1 : A clandestine or casual meeting to indulge sexual urges, devoid of any meaningful social engagement. Typically occurring between the hours of 12-4am, subsequent to one party becoming inebriated or failing to secure sexual relations with a more appealing partner(s).

2 : Disparaging title for the lesser of two unequal partners in a booty call relationship; typically this individual does not realize or accept that the relationship is limited to a booty call. Often called a fuck buddy.

1 : I don't wanna taker her out, just hook up a booty call.
2 : No, we're not dating; she's just a booty call.

When someone calls someone else up and is like, "Hey, let's have sex." Usually it's not said that upfrontly, though. Usually it's done over text, initiated with some flirting and a lot of winky faces.

However, according to the region, booty call can mean something quite different. In certain towns such as Provo and Rexburg, where sex before marriage is highly discouraged, some of the residents loosely use the term in place of "NCMO".

Normal use:
I'm feeling a bit lonely tonight. Time to make a booty call.

Provo/Rexburg/other conservative towns use:
Guy 1: So my ex started texting me again the other night.
Guy 2: Seriously? What did she want?
Guy 1: She said she missed me and that she wanted to hang out.
Guy 2: Dude, total booty call.
Guy 1: Yeah, we ended up making out for like 15 whole minutes.
Guy 2: Get itt.